Breeding technology of American red maple

American red maple, maple genus, also known as Canadian red maple, native to the east coast of the United States, large deciduous trees. It grows fast, and the adult tree is 12 to 18 meters high and has a crown width of 12 meters. It can adapt to a wide range of soil types. Spring blossoms, flowers red. Because of its eye-catching colors in autumn, the canopy is neat and tidy. It is widely used in parks, communities, and street plants. It can be used for garden landscaping and street trees. It is deeply loved by people. It is the ideal and rare for the beautification and greening of urban gardens introduced in recent years. One of the tree species. The summary of nursery technology is introduced as follows:

First, choose and deal with

American red maple seedlings should be selected from sandy loam with mild acidity, moisture, good water permeability and good irrigation conditions. Before the sowing, 5000kg of organic fertilizer and 50kg of NPK ternary compound fertilizer were applied per acre. In order to prevent seedling pests and diseases, especially underground pests, 8 to 10 kg of ferrous sulfate and 2 kg of phoxim granules are required per acre, mixed with fine soil, sprinkled on the surface, and then deep-plowed, fine-tuned, and smoothed. The width of the raft is 1 meter, the width of the raft is 30 centimeters, and the length of the raft is 20 to 30 meters.

Second, seed treatment, planting time and method

American red maple seeds have no dormancy, and can be used for both autumn and spring sowing. The sowing time is from mid-March to mid-April. Before the sowing, the seeds and the wet sand should be mixed at a ratio of 1:3, and then placed under the condition of 3 to 5 ° C for one month of low temperature sand storage. During the stratification period, it should be inspected and managed regularly, and germinating seeds should be found. Seeding should be carried out in time. When planting, first fill the bottom water in the sputum, wait for the water to seep and re-broadcast, and the seeding amount per square meter is about 200. After sowing, cover 0.5 cm of fine soil to raise the ground temperature for soaking, so that the seeds are budded early and the buds are neat, covering the mulch or small arch shed. The arch shed should be ventilated, and the temperature should exceed 30 °C for proper shading. Generally, about 15 to 20 days after sowing, the seedlings are released.

Third, seedling management and growth

After the seedlings are unearthed, the initial growth is slow, the resistance is poor, the water should be sprayed frequently, the soil moisture should be kept, and the weeds should be removed in time. When the grass is raked, the soil should be soiled in time, and some soil should be cultivated as much as possible to prevent lodging. When the seedling grows to a height of 5 cm, the seedlings are fixed. Generally, after the water is irrigated, the plants are weakened, diseased and seedlings according to the spacing of 10 to 15 cm. The seedlings are kept robust and tidy. The place where the seedlings are lacking is selected to carry the soil ball transplanting seedlings. . At the beginning of June, urea was applied in combination with watering, 15kg per mu. In mid-July, 10~15kg of urea was applied per acre, and water was properly controlled later. If a pest such as a moth is found, it can be sprayed with 2.5% deltamethrin 4000 times solution.

The seedling height can reach 1 to 1.5 meters in the same year, and the next year can be planted.